Over the past decade or more, the art relating to modern optical waveguides has evolved as a nighly focused interdis- ciplinary field, so attractive, stimulating and full of far- reachin3 promise that no parallel could be found earlier in other branches of applied sciences except, perhaps, in solid- state electronics and computer technology. This Proceedings, with a selection of 53 papers and briefs by 96 authors of 16 countries, is of real internation- al dimensions. It is the outgrowth of the International Symposium held June 20-23, 1983, the first international meeting on this subject...